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參數資料
| 型號： | L9215A |
| 廠商： | Lineage Power |
| 英文描述： | Short-Loop Sine Wave Ringing SLIC(短環(huán)路正弦波振鈴用戶接口（SLIC）) |
| 中文描述： | 短回路正弦波振鈴用戶接口（短環(huán)路正弦波振鈴用戶接口電路（SLIC）） |
| 文件頁數： | 10/46頁 |
| 文件大?。?/td> | 1165K |
| 代理商： | L9215A |
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Advance Data Sheet
October 2000
Short-Loop Sine Wave Ringing SLIC
L9215A/G
10
Lucent Technologies Inc.
Pin Information
(continued)
Table 1. Pin Descriptions
(continued)
Operating States
Table 2. Control States
32-Pin
PLCC
20
Symbol
Type
Name/Function
TRGDET
O
Tip/Ring Ground Detect.
When high, this open collector output indicates the
presence of a ring ground or a tip ground. This supervision output may be used in
ground key or common-mode fault detection applications.
Common-Mode Current Sense.
To program tip or ring ground sense threshold,
connect a resistor to V
CC
and connect a capacitor to AGND to filter 50/60 Hz. If
unused, the pin is connected to ground.
Polarity Reversal Slowdown Capacitor.
Connect a capacitor from this node for
controlling rate of battery reversal. If ramped battery reversal is not desired, this
pin is left open.
Polarity Reversal Slowdown Capacitor.
Connect a capacitor from this node for
controlling rate of battery reversal. If ramped battery reversal is not desired, this
pin is left open.
Protected Tip.
The output drive of the tip amplifier and input to the loop sensing
circuit. Connect to loop through overvoltage and overcurrent protection.
Protected Ring.
The output drive of the ring amplifier and input to the loop sens-
ing circuit. Connect to loop through overvoltage and overcurrent protection.
State Control Input.
These pins have an internal 60 k
pull-up.
21
ICM
I
22
FB2
—
23
FB1
—
24
PT
I/O
25
PR
I/O
26
27
28
29
30
B2
B1
B0
BR
ITR
I
u
I
Transmit Gain.
Input to AX amplifier. Connect a resistor from this node to VTX to
set transmit gain. Gain shaping for termination impedance with a COMBO I codec
is also achieved with a network from this node to VTX.
ac Output Voltage.
Output of internal AX amplifier. The voltage at this pin is
directly proportional to the differential tip/ring current.
ac/dc Separation.
Input to internal AAC amplifier. Connect a 0.1
μ
F capacitor from
this pin to VTX.
31
VTX
O
32
TXI
I
B0
1
1
1
1
1
1
1
1
0
0
0
B1
1
1
0
0
1
1
0
0
1
0
1
B2
0
0
0
0
1
1
1
1
1
0
1
BR
1
0
1
0
1
0
1
0
1
1
0
State
Forward active
Forward active with PPM
Reverse active
Reverse active with PPM
On-hook transmission forward battery (in this state the device will power up)
On-hook transmission with PPM forward battery
On-hook transmission reverse battery
On-hook transmission with PPM reverse battery
Scan
Disconnect
Ring
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| L9219A | 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and Dual Current Limit |
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